Thanks for the shout-out! I'm really glad people are still finding the telegram library useful, I still think it's the easiest way to do push notifications on an esp device!
5:22 The problem with the notification delay is due to Android's standby services (Doze Mode, to be more specific) since like A8, so you need to define "priority: high" parameter (look into dev documentation for HomeAssistant), then it bypasses it and notifications are pushed instantly.
Is it just doze mode and not something else as well? Afaik doze activates when the device is not in use for quite some time while stationary. So really he should only have issues when it's sitting on a desk for half an hour, not even in a pocket or so. But android devices have also picked up the habit of trying to shut off everything that's not high priority, even without doze, unfortunately.
@@LuLeBe In my experience with multiple Samsung phones, it's basically only the Doze, after disabling it via adb, everything works perfectly fine. Unfortunately without root it needs to be disabled after every restart, soo... after many headscratches I was insanely glad I found that there is something like a critical notification and it's possible to fix it at least for HomeAssistant. But sure, it could be also affected by other processes. (I'm more like stubborn tinkerer than a developer xD ) Btw: Doze intereferes even after 5minutes of "idle" (phone on a desk with display turned off), but it could be manufacturer dependant.
the SMS/messaging round trip is also incredibly slow and unreliable. i imagine it would be much faster to send some magic packet across your LAN to your device(s), that way you can even get desktop notifications or use something like Tasker on your phone to alert accordingly
Yes, agreed it would be better solution in an apartment you are renting in. If landlord sees you modified something like this they can take your deposit when you leave.
That was the reinvention of the tire. Had the same problem - the solution was a simple system for under 20€ from Reichelt with a sensor next to the bell that sends a wireless signal when it 'hears' sound and a receiver with a second bell or a light that flashes when the bell rings. No significant delay (maybe a few milliseconds) and you don't need an external service (a big plus). Something like that is sold for years for people that are deaf or need hearing aids or have a loud environment and works for every bell. Ritto, the company that built your house phone, has relays in their catalogue to switch external non Ritto products when the bell rings and offers additional wireless remote bells or remote flashing lights. Other companies even offer a high power relay (8KW) that you can integrate in a fuse box to flash all lights when someone rings the bell. It is used when all people in a household are deaf.
Well yes and no. I did also use a wireless sender/receiver product for my grandma, so she does not miss the bell when she is in the living room with the TV turned all the way up. Not as cheap as an ESP but a lot less hassle for sure! That said, the solution provided here is applicable (and used) for much more than deaf/hearing impaired/working in loud environments or with headphones! Since it is in fact NOT locally extending the bell alert, one can get notified away from home that somebody rang the doorbell and with the second contact mentioned even trigger the door buzzer remotely…. something the local RF extender cannot do.
Something tells me that this project is not for those who want easy solutions. xD It's a kind of fun all of its own to tinker about in electronic boards and chips and find out which pin does what, to then make some sort of system out of it with just a soldering iron and some cheap electrical components. Oh and an overpriced Rπ ofc.
I would have used an optocoupler. That way the ground of my system won't be connected to the ground outside of the apartment. At any time someone can change the wiring and blow things up. Also reduces the possibility of anything I'm doing creating a shock hazard for others.
@@m3mem4chine86 From the looks of the layout the supply is basically floating. It can assume any voltage above ground it needs to. When you're running cables a long distance isolation is your friend. You have no control over what can happen on the other end of the wire.
I actually did it this way and it works perfectly. Tho my bell sits at 18V normally and rises up to 24V when ringing, so I put a zener infront of the optocoppler. Furthermore two optocopplers were used to be able to activate the push buttons on the intercom wirelessly (using homeassistant). Works like a charm!
Something cool you might add to the system you’ve already built is controlling the buttons to open up the door or answering the intercom from your smartphone without having to walk to your intercom
Answering the intercom might be a bit tricky, but something like opening the door should be relatively simple given that it's done through a simple momentary switch. Main issue with it would be interfacing in a non-destructive way so that it leaves no traces if you eventually move out again.
@@JeppeBeier i actually did that using a SONOFF RE5V1C whose switch is decoupled from power voltage although it was abit more weird cause my intercom uses 16v AC.
@@greatscottlab I appreciate the honest response - no joke. An optocoupler does seem like a good idea. At minimum, it avoids a potential ground loop from the second (5V) supply many meters away from the system’s supply. Also, who knows how the system will react during power-up, power-down, lightning, etc. It also protects you and your equipment from any other electronics experimenters in your building :).
@@jasond.valentine5931 the two main ones for me would have been 1) decoupling the 5v reference of the other system. Who's to say that the ground references can be relied upon to be the same? 2) no risk of the controller putting voltage *out* back on to the intercom for example if the pins are briefly configured as outputs before your code starts to run on boot-up.
@@jasond.valentine5931 there is another comment made around the same time as mine which has gained more traction with a bunch more answers, so search for that one for more ideas
As a landlord myself, I would strongly recommend using an optocoupler. These intercom systems are not as stable as you would think. The connected ground and the y capacitor in your smps are some troublemaker.
Yep. Especially when other tenants trigger the door opener, you can see huge voltage spikes on these systems caused by the inductor in the door opener.
Neat project but I think, given the size and infrequency of visitors to your door you should have just added a lipo battery, bypassed the 5v->3.3v regulator and created a trickle charge circuit to draw
and one day the lipo bulges, catches fire while he's not at home and the landlord WILL be mad if his house is burned down from a not officially approved "smart home" device.
Some time later when Scott moves out and forgets the box. New occupant: "Gets a ring* Scott's phone: *Get a notification* Scott: "Oh crap forgot to remove that"
Awesome project, I pretty much did the same thing last year to the exact same intercom system. Take a look at pushover, I used that instead of telegram to add a custom button to the notification, which can immediately open the door as well. Super handy when you forgot the key or someone arrived earlier than you btw
@@greatscottlab You can also cut the the middleman without using universal telegram library and just send a POST request through Telegram API if it's just a one-way communication from ESP to telegram.
@@greatscottlab Pushover is great, it's also integrated into Home Assistant so you can add everything to Home Assistant and do all your automations and other such stuff there as well, and I found it quick and reliable for pushing notifications.
+1 for Pushover. Excellent messaging API. I use it and a backup channel for critical server monitoring notifications so both speed and reliability is key. In practice I almost always get the Pushover message a second or two before the email; the email is configured to send *first* 😛
You could have used a supercap to provide power for the peeks. This would have enabled the whole thing to fit inside the original enclosure... Also you could have used bluetooth LE notifications so that your phone sound only if you are at home 👍
Did this also to my doorbell. I also connected a relay to the door opener, so the postman can come up to my apartment while I am moving to the door :) I used nodered for the Telegram message receive handling to open the door.
I think this is the better approach. If he already opened the intercom, connected an external power supply and created a whole new enclosure, the door opener would have made this project a 10 out of 10 for me.
Out of curiosity - have you looked into Nuki? It’s not DIY, but similarly to your build attaches to the intercom and offers (remote) unlocking as well. I’ve been using it for a few years and it’s been a game-changer.
In the beginning of your video, I was thinking "this is a job for the telegram botfather". Now that you've started down this road, you'll find you can get homeassistant to talk to the channel as well. My home talks to a house telegram channel, pushing notices as need, such as "hey, do you realise you've left the main gate open for more than five minutes?" And the whole family can subscribe to the channel - win win!
Plot Twist: His schedule of shooting this video got delayed because his components for this project was not received by him because he was busy soldering with music on
There are some things to note. Android Smartphones can be very tricky with engery savings, resulting in delayed or even no notification. A deeper look into the settings may help. There are a few things. Usually allowing an app to run it in the background and maybe even start itself and fideling with the engery settings of an app. Some apps can handle it better than others. Maybe it can be even an issue of the app itself. With push notifications there are different types. Usually push means a server is pushing a message to your phone. An old way and a slow one is when the app needs to pull the notification itself. When you are not happy on how apps work with these things, asking for help in the forums might give you options to change and help you to make it work for you better. With the energy I must say that pulling energy from the intercom might be illegal. It can be considered theft. In apartment buildings its usually powered from outside your apartment and meaning the community pays for it. There are smart home door solutions that are aware of it and they have options to power it from your end, so you don't steal energy. In reality it might be hard to spot and the landlord doesn't care. But let's not forget, everyone is paying for it, for something you only use. I also want to mention that this idea isn't new. There are solutions to connect an intercom to your phone. It's for the landline phone. You can control your intercom with it. It's usually for businesses. Also it's not that cheap, especially when you don't have a landline setup at home. But when your intercom supports it, you could open your door and speak to the intercom from your phone. You may not require a landline phone, because there are systems that support soft phones, meaning software phones and that means you could use a smartphone app. It's like a phone call. I think a remote opening might be useful for deliveries. This gives you the time to go to the door, when the delivery guy is going up the stairs. I'm not quite happy with the solution. It relys on external services. I would prefer a solution that doesn't need any external services. It would be nice when you could speak through the intercom via your phone and maybe even open it. The opening part should be optional, because this is a security risk and it might be good enough when you can speak to the person until you are at the door.
A relay can be added and commanded by ESP to short the “door open button” contacts. But probably he wants to listen to the person on the other side before opening the door!
@@ubiquitousingit Lol... Right. A better idea then! Add a camera to the ESP like the one he uses for security, facing outwards. The moment someone knocks the message contains a picture of whoever is at the door. Seems feasible 👌🏼
Cool project! I was thinking you could of gotten a long range wireless doorbell, wired the button into the intercom system so that when you press the intercom button it triggers the receiver, which you could have sitting on your desk. You could even add flashing lights to the receiver (some already come with this feature) so it's not just an audio chime alerting you. You obviously aren't notified when not at home though.
Personally, I would recommend placing a small (100nf) capacitor between the ESP's GPIO pin and ground. This capacitor and the upper resistor of the voltage divider form an RC filter that will help to reduce any transient interference which might cause false triggering. I might also suggest a bidirectional TVS diode in the same location to protect against any large voltage spikes or ESD.
9:34: Four seconds from pushing the doorbell and message appearing on the phone. Where I live, that's more than enough time for the delivery person to drop the package at some neighbor's house and race out of sight.
A light that flashes in your work space. A hard of hearing relative of my wife had a system that flashes rapidly if phone rings (old school home phone) and flashes a slower signal if the door bell is rung. Both elderly passed away more than a decade ago. It was part of a commercial security system that is long gone, but great idea.
OMG! I have exactly the same doorbell system in my terrible apartment, and the alarm sounds are just super painful, each time nearly giving me a heart attack! What do you think about a project that would give that crappy system some more pleasant ring tones? xD And I also have another idea: I'm in great fear of loosing my keys, because of the high cost to have some service open the door and possibly replace the door lock - so do you think you could create a system that opens your apartment's door by entering a programmable code sequence using the bell (like some letters in morse code or such..)
A lot of apartments around me in the US have really analog systems with terminals by TekTone. They have a dedicated wire for the "warble" tone when the doorbell is pressed. So I put a current-transformer around that and use it as an input in ESPHome, which works reliably. And I figured out what terminals to connect to trigger the door strike and connected a relay to them. It works really well and doesn't even require soldering since all the connections are at the screw-terminals.
He could have just installed a microphone instead of that circuit imo, as the doorbell rings the microphone could pick up the bell sound and then initiate the bot he later used. Tell me if I am wrong.
Although this kind of projects might sound boring, it's my favorite (after the super crazy ones) because it solves those annoying little problems that end up being completely frustrating.
Nice would be to add remote door unlocking also, if you can send a message back to the controller you could just close the circuit of the unlock button
Nice video. Btw, what about adding an ESP Cam or a RPi Cam to the doorbell ? That would be awesome to check out who's in front of your door ! If it's the postman than your good ! If it's the 'Schuldeneintreiber' pretend that your not there... ;-)
Thank you for every inspiring video you post, but i would have to say that this time i was faster on creating similar system with a bit more functionalities. The one i built uses ESP32 and Uses battery as power source all enclosed inside the intercom itself. In addition to the regular notification that uses HA, i wired one of the pin to the unlock button, and using ESPhome that create a sensor, with some useful information such how many times my door being rang a month. I wanted to take that further, so i built an automation that will send actionable notification if i am home or away, but if i am at the building door but not inside the flat the system will trigger the unlock for me. so i do not need keys for the below door. it takes 7 seconds for the system to wake up from deep sleep, and trigger the door or send the notification.
Nice project. I now have interest in more info about the telegram bot. Anyways, I would have added a optocupler between your hardware and the intercom so as to fully isolate both systems.
@ GreatScott! You can implent this with Home Assistant as well. Just do the doorbell ESP with ESP-Home and implement Telegram into your HomeAssistant. Ihave this with an automation for my washing machine and dryer. I get a message if the Powerconsumption drops under a certain value.
Interesting - I would take DC2DC converter and convert the 24+-V to 3.3V of the ESP. It uses peak 70mA, normally around 40mA, on 3.3V that makes 230mW peak, with 20% losses of the DC buck converter you get to 280mW max. No problem for neighbors :)
I was going to say the same thing! A DC-DC converter could easily power an ESP. Even at full ESP power, you have PLENTY of headroom. And if there was any worry about EMI, etc, you could just reduce it to 4/5v, and have the 3.3LDO drop the rest.
Thanks for the info, I was able to have my old 1970's doorbell to send notifications to my phone but i had to make some modifications to the code and the pins!
i did almost the same in my flat years before :) I used a small mic, glued next to the ring speaker, and - since there was no ESP32 back then (or at least i don't had one) I made a louder alarm sound closer, where I usually stay :)
@@xmfclick There are maybe a few more ups to it. Because he get's notified even outside of his flat. Also he can use it for automations. I for example built a "Party mode" in mine. If party mode is set to on, it will automatically buzzer the entry door or if at the apartment door, open the nuki. So people arriving to the party or going for a smoke don't need a key or rely on somebody to let them in again.
Scammers love to use WhatsApp and Telegram. If you see youtube comments or facebook posts with a contact number using one of those 2 services, it's essentially a 100% chance it is a scammer who will lie to you and find a way to trick you into giving them YOUR money, while you think you giving them THEIR money back.
I've done pretty much exactly the same thing about a year ago. I just used a shelly to send a notification to my phone using MQTT and home assistant. It can also be used to controll the lights which would be quite helpful to a deaf person lol.
Very Clever Idea 😄It's also useful when we are outside the house (travelling or office)👍 I request you to introduce a project with new Blynk app in next time ? Thank you❤️ Love from Kerala
Really cool & useful system,. yet what I find most impressive is how he has cable cover/duct on a wall that has significant texture. Long ago I gave up on using any cable ducts on textured walls because they never last a month before loosing grip.
Have an idea, to use that intercom system to call to your phone. You can probably use SIM800 modules or similar ones. You can control answering button with esp/arduino also. :) Good video by the way ;)
That system is actually in use in some apartment buildings, at my uncle's house they get a call whenever someone rings the bell and they can talk to the person at the door. I think it's opened by pressing a certain number key on the phone.
Nice project. But integrating it with esphome and home assistant would have been way better. Home assistant does intergrade with telegram and you could have added an led strip at your desk that could flash a couple times when someone's at the door.
Leaving a comment for if anyone explains on how to do this and also in combo with maybe a video feed, because i have a comelit with video 2 wire config and trying to figure it out but i am not that technical, only a bit 😅
I once took a look inside the intercom in my apartment to try to do something similar and was shocked to find that the one I have ran on 230VAC, just at a screw terminal, that I can’t turn off myself. Needless to say, I put that project on the backburner and thought of alternative ways of detecting a ringing intercom. I do know some smartphones have a built in assistive listening feature that in theory would notify a user of a doorbell sound, but I’m guessing that’s only effective if the phone is close enough to hear it clearly
Thanks so much. I wanted to tackle the same system a year ago without reverse engineering the whole circuit board. (I've got the 4 button version without the phone handle) Was about to use ldr and a relay to trigger incomming bells and opening the door but decided against it as it would probably end up pretty unreliable. This makes it a lot easier. I'll probably use an optocoupler and a relay for opening to not interfere with the board but finally some guiding light without interfering with that complicated bus protocol. As said: Thanks! Got new motivation :)
Important to implement a Opto Isolation if you connect your power supply to any other ground referenced circuits so you do not have strange effects due to multiple grounding points-
Yes, and No, given a near buy Lighting Strike could induce many KV's into the intercom wiring, the optocoupler may be of no value. So I would give this design a fail.
I appreciate a nice DiY solution but last I checked you can change your interphone to whatever you want, including one that connects thru WiFi or Bluetooth and send you notifications...
Just a word of warning: it is easy to fry the controller in the basement and sometimes just adding a wire to e.g. the door opening button can make the bus lock up due to some EMV. And the controllers are really expensive so maybe putting a microphone next to the piezo is a more non invasive way :) And yes, I witnessed these kind of projects going wrong three times
The problem with a microphone next to the piezo is that vacuuming near the door can, if the noise level is sufficient, also trigger a constant stream of messages. My little brother has cochlear implants, and my father installed a bell add-on in our house such that my little brother would receive an extra audible and visible notification to his room. It was unfortunately also triggered by vacuuming near the door, essentially making it quite useless.
@@Mrcaffinebean nope, definitely not. A 10m long cable attached to the door open buttons to operate it from a table locked up the system, removing the wire then allowed it to be used again
Hey Scott can soldering wire in my local market cheap quality of wire are available which have 60% lead & doesn't melt at easily making it hard to remove while replacing components and doesn't shine there are also wire with 40%lead . Displaying it's property physically and electrically can u make a video and where to use them.
From watching your tutorials as a university student to get featured in your video (indirectly though 5:38 ). I never knew this is going to happen. Thank you for your tutorials which helped me learn alot!!!
wait is that allowed by your landlord/law? I wanted to do something similar when I was living in an apartment but apparently (for me tho) it was illegal to mess with the intercom since I did not 'own' the the intercom.
I am not interfering with the intercom in any way. I use my own power and basically only listen for a certain signal. That is why I think it is kind of like a grey zone. But like always, rebuild it at your own risk.
The biggest issue with the solution may be that he soldered the wires on the connector tabs. At least when he forgets to remove the wires and solder when moving out, so adding an accessory with the proper connector there would involve additional work. And some contractor may just say that it has been altered and needs to be replaced entirely.
@@agnag1 If he just clips the wires inside the case, i doubt anyone would ever open it up, if it still works ofc. They will probably not even care at all, till someone tells them that it's not working. Just imagine the contractor opening all electronics and power outlets just to see if everything behind is still how it's "supposed to be" .. not gonna happen, ever.
I am definitely going to be making some modifications to my front door now. I can never hear when people knock when I'm in my room tinkering, but I usually have a video running on my phone, so push notifications are the perfect solution for me.
Iv'e wanted to build similar system for years, but in addition, I would like to simulate the "open door" button press from the micro controller as well. That way, I can even let in post man while I am not home, which would be incredibly useful. @GreatScott! could you upgrade your system to do this ?
tbh i like the old intro better. I find the real physically built LED sign to be more satisfying. plus im sure most of us can appreciate how long that took to make haha
Nice! It's maybe better to send an MQTT message to Home Assistant though? From there, you can trigger automations, sound buzzers, flash lights, or send IM notifications using the same APIs. Seems like the more capable option.
Yep. I don't directly connect anything anymore. It all goes through MQTT and Node-Red. I can change the conditions and active times for any input and output that way. A button I push when I wake up can do something different an hour later and do something else again when it's bed time.
I was looking for something like this thanks, but for me, I only have a door bell which is old solenoid based ie when current passes through it it gets magnetized which rings the bell and is directly connected to mains so is it possible for me to do this? And also is it possible instead of notification it rings my phone??
You could also integrate the telegram notifications with the Home Assistant. That way, you not only can send the notification, but also trigger the door lock with telegram actions from your phone.
I’ve had pretty good results using a webhook via IFTTT and sending a push notification to the IFTTT app from various devices. Whether it be from a raspberry Pi, an ESP32, or a Particle Photon. You can structure the message using various values passed to the webhook. Anything from door opening notifications to low battery monitors, notifications have been pretty quick, usually within a second or two. I need to check out that Telegram library though just for some other options.
I'm so sorry for you having that intercom. Those things have become a personal nightmare over the past few years. Also I've seen a lot of people do something like this. BUT From the perspective of the guy searching an entire apartment building for whatever causes the intercom system to stop working. Always again fun.
You could add functionality to also open the door from the app (i.e: With an interactive action in the message or by replying a particular message to the bot). I'm interested in this, I also live in Germany :D
By far the most overcomplicated, overenginieered, unsafe, half-finished, unreliable, overkill semi-permanent solution to a non-problem. Absolutely loved it!
I also built something similar about 3 years ago with an arduino nano and an nrf24l01 which directly used the power of my Ritto door opener. I also added a solid state relay to turn on/off the bell at will and to fire the buzzer at the front door. It was really a fun project and extremely useful. Now after moving to my new apartment, I opted for a commercial solution: Nuki Door Opener. That thing is extremely easy to integrate with not much tinkering / reverse engineering the original door opener PCB. But OFC way more expensive (~100 Bucks).
Interesting video! I've had also similar idea, but had the bus-system in mind.. Hast du während deiner Recherchen zufällig rausgefunden, ob man das Bussystem nutzen kann um untereinander zu kommunizieren? Wird eine Verschlüsselung benutzt? Wir haben in unserem Wohnblock exakt die selbe Anlage, aber für ca 100 Wohnungen :D
I was thinking of doing something similar but with zero modifications to the intercom. Basically a microphone and a trained AI that can listen for the sound. It wouldn't be as responsive but they also couldn't blame me if the intercom broke.
Alot of effort to get the AI trained and up and running but yeah would be nice since it doesn't require direct mods to the intercom. I'm sure the landlord trusts him lol
I don't know how to feel about this. i was literally thinking about this 3 hours ago wondering whether it existed or not. now this appeared on my recommended. Funny/weird thing about it is that I wasn't even thinking out loud
Your power supply math is wrong! The esp8266 chip can handle a max of about 250ma (I suspect your project would barely even reach 150) at 3.3v. This makes the total more like 0.825VA peak, easily a safe amount to use, even if all your neighbours had them too!
Had the same thought. There seemed to be plenty of room inside, but maybe he wanted to avoid making a permanent change to the actual phone housing to route cables in (which may annoy the landlord).
Thanks for the shout-out! I'm really glad people are still finding the telegram library useful, I still think it's the easiest way to do push notifications on an esp device!
Thanks for your great work :-)
I wasn’t aware of the library and ended up sending the POST request instead. Will be trying it out in my next project.
Brian's last name is pronounced "lock", you were close Scott!
Use it for everything! Complete and easy to use
Thank you for the library. I used it myself about a year ago with a PIR sensor to detect rat activity in one of the barns.
TLDR How to get notifications on WhatsApp: Uninstall it, then get Telegram
Incorrect, use session
5:22 The problem with the notification delay is due to Android's standby services (Doze Mode, to be more specific) since like A8, so you need to define "priority: high" parameter (look into dev documentation for HomeAssistant), then it bypasses it and notifications are pushed instantly.
Thanks for the tip
Is it just doze mode and not something else as well? Afaik doze activates when the device is not in use for quite some time while stationary. So really he should only have issues when it's sitting on a desk for half an hour, not even in a pocket or so. But android devices have also picked up the habit of trying to shut off everything that's not high priority, even without doze, unfortunately.
@@LuLeBe In my experience with multiple Samsung phones, it's basically only the Doze, after disabling it via adb, everything works perfectly fine. Unfortunately without root it needs to be disabled after every restart, soo... after many headscratches I was insanely glad I found that there is something like a critical notification and it's possible to fix it at least for HomeAssistant. But sure, it could be also affected by other processes. (I'm more like stubborn tinkerer than a developer xD )
Btw: Doze intereferes even after 5minutes of "idle" (phone on a desk with display turned off), but it could be manufacturer dependant.
and not to mention that well.. it's the internet and you're relying on someone else not being overloaded (IE the bot or telegram)
the SMS/messaging round trip is also incredibly slow and unreliable. i imagine it would be much faster to send some magic packet across your LAN to your device(s), that way you can even get desktop notifications or use something like Tasker on your phone to alert accordingly
That looks like a standard PCB edge connector. You could also have used one of those and avoided soldering to the board directly.
Yes, agreed it would be better solution in an apartment you are renting in. If landlord sees you modified something like this they can take your deposit when you leave.
So cool to see old tech being "modernized" with the help of a little microcontroller :D
I think so too :-)
Thats not a little microcontroller though. Its pretty powerful for a micro controller
@@uvuvwevwevweossaswithglasses The dimensions are little.
@@greatscottlab U can sell cute little greatscott electronic components plushies!! I think people may buy them ! lol..
@@uvuvwevwevweossaswithglasses a micro controller is little, it literally has the word 'micro' on it...
That was the reinvention of the tire. Had the same problem - the solution was a simple system for under 20€ from Reichelt with a sensor next to the bell that sends a wireless signal when it 'hears' sound and a receiver with a second bell or a light that flashes when the bell rings. No significant delay (maybe a few milliseconds) and you don't need an external service (a big plus). Something like that is sold for years for people that are deaf or need hearing aids or have a loud environment and works for every bell.
Ritto, the company that built your house phone, has relays in their catalogue to switch external non Ritto products when the bell rings and offers additional wireless remote bells or remote flashing lights. Other companies even offer a high power relay (8KW) that you can integrate in a fuse box to flash all lights when someone rings the bell. It is used when all people in a household are deaf.
Well yes and no. I did also use a wireless sender/receiver product for my grandma, so she does not miss the bell when she is in the living room with the TV turned all the way up. Not as cheap as an ESP but a lot less hassle for sure! That said, the solution provided here is applicable (and used) for much more than deaf/hearing impaired/working in loud environments or with headphones! Since it is in fact NOT locally extending the bell alert, one can get notified away from home that somebody rang the doorbell and with the second contact mentioned even trigger the door buzzer remotely…. something the local RF extender cannot do.
Something tells me that this project is not for those who want easy solutions. xD It's a kind of fun all of its own to tinker about in electronic boards and chips and find out which pin does what, to then make some sort of system out of it with just a soldering iron and some cheap electrical components. Oh and an overpriced Rπ ofc.
I would have used an optocoupler. That way the ground of my system won't be connected to the ground outside of the apartment. At any time someone can change the wiring and blow things up. Also reduces the possibility of anything I'm doing creating a shock hazard for others.
I was going to say the same thing. Also gets around the level shifting too.
This. You're also assuming that the 5V supply isn't grounded.
@@m3mem4chine86 From the looks of the layout the supply is basically floating. It can assume any voltage above ground it needs to. When you're running cables a long distance isolation is your friend. You have no control over what can happen on the other end of the wire.
Europlugs dont have ground connection that the powersupply used.
I actually did it this way and it works perfectly. Tho my bell sits at 18V normally and rises up to 24V when ringing, so I put a zener infront of the optocoppler. Furthermore two optocopplers were used to be able to activate the push buttons on the intercom wirelessly (using homeassistant). Works like a charm!
Something cool you might add to the system you’ve already built is controlling the buttons to open up the door or answering the intercom from your smartphone without having to walk to your intercom
Answering the intercom might be a bit tricky, but something like opening the door should be relatively simple given that it's done through a simple momentary switch. Main issue with it would be interfacing in a non-destructive way so that it leaves no traces if you eventually move out again.
@@JeppeBeier The mic and speaker of the handset should be quite easy to intercept, as they are analog and accessible via the connector.
@@JeppeBeier i actually did that using a SONOFF RE5V1C whose switch is decoupled from power voltage although it was abit more weird cause my intercom uses 16v AC.
@@ΜΑΝΟΣΚΟΥΤΣΑΚΗΣ-ν7δlooking for doing this project, with open notification AND open door with this PCB but i’m afraid to breack the intercomms system
Did you consider putting an opto-isolator between the intercom and the ESP, rather than connecting the intercom's 5v signal directly to the ESP?
Not really.....
@@greatscottlab I appreciate the honest response - no joke. An optocoupler does seem like a good idea. At minimum, it avoids a potential ground loop from the second (5V) supply many meters away from the system’s supply. Also, who knows how the system will react during power-up, power-down, lightning, etc. It also protects you and your equipment from any other electronics experimenters in your building :).
curious newbie here, what problem would an octo solve?
@@jasond.valentine5931 the two main ones for me would have been 1) decoupling the 5v reference of the other system. Who's to say that the ground references can be relied upon to be the same? 2) no risk of the controller putting voltage *out* back on to the intercom for example if the pins are briefly configured as outputs before your code starts to run on boot-up.
@@jasond.valentine5931 there is another comment made around the same time as mine which has gained more traction with a bunch more answers, so search for that one for more ideas
As a landlord myself, I would strongly recommend using an optocoupler. These intercom systems are not as stable as you would think. The connected ground and the y capacitor in your smps are some troublemaker.
Yep. Especially when other tenants trigger the door opener, you can see huge voltage spikes on these systems caused by the inductor in the door opener.
Why is everyone suggesting optocpuplers. I mean I love optocouplers (theyre so cool *-*..) but couldnt you just also simply use a relais ?
Neat project but I think, given the size and infrequency of visitors to your door you should have just added a lipo battery, bypassed the 5v->3.3v regulator and created a trickle charge circuit to draw
Yup 👍🏻🇬🇧
an pcb edge connector wouldve been neat, agree
a buck converter like 2596 board is near 90% eficient, so 5v * 0.1a ( 80ma + loss) its .5w in 24v line not 6va
and one day the lipo bulges, catches fire while he's not at home and the landlord WILL be mad if his house is burned down from a not officially approved "smart home" device.
@@casemodder89 he can use a joule theif
Some time later when Scott moves out and forgets the box.
New occupant: "Gets a ring*
Scott's phone: *Get a notification*
Scott: "Oh crap forgot to remove that"
Yeah, he might forget about that while taking kitchen apart.
Seeing how much effort this took, I can see why you didn't have time to make the ESP play text-to-speech when you type a whatsapp message to it.
@BBMS Official pateron
@BBMS Official true. This is a difference between public and private videos.
@BBMS Official
Not 11 but 12 days ago😅
@BBMS Official sorry I should be more careful not to cause paradoxes in the time continuum.
"Wife alert!" LOL 😆 I love it.
You definitely need the same sound as your door bell as notification message sound for that telegram chat 😂
Haha good idea
Postmen send telegrams, just like they did 200 years ago
Awesome project, I pretty much did the same thing last year to the exact same intercom system. Take a look at pushover, I used that instead of telegram to add a custom button to the notification, which can immediately open the door as well.
Super handy when you forgot the key or someone arrived earlier than you btw
Yep, i would also recommend taking a look at pushover.
Thanks for the tips!
@@greatscottlab You can also cut the the middleman without using universal telegram library and just send a POST request through Telegram API if it's just a one-way communication from ESP to telegram.
@@greatscottlab Pushover is great, it's also integrated into Home Assistant so you can add everything to Home Assistant and do all your automations and other such stuff there as well, and I found it quick and reliable for pushing notifications.
+1 for Pushover. Excellent messaging API. I use it and a backup channel for critical server monitoring notifications so both speed and reliability is key. In practice I almost always get the Pushover message a second or two before the email; the email is configured to send *first* 😛
You could have used a supercap to provide power for the peeks. This would have enabled the whole thing to fit inside the original enclosure... Also you could have used bluetooth LE notifications so that your phone sound only if you are at home 👍
Did this also to my doorbell. I also connected a relay to the door opener, so the postman can come up to my apartment while I am moving to the door :) I used nodered for the Telegram message receive handling to open the door.
I think this is the better approach. If he already opened the intercom, connected an external power supply and created a whole new enclosure, the door opener would have made this project a 10 out of 10 for me.
Next episode: how to extinguish a fire because the heat gun was left on while answering the doorbell.
Out of curiosity - have you looked into Nuki? It’s not DIY, but similarly to your build attaches to the intercom and offers (remote) unlocking as well. I’ve been using it for a few years and it’s been a game-changer.
I reckon you could have powered the ESP from the intercom. I would have put it inside the intercom. I would have used a plug rather than solder.
In the beginning of your video, I was thinking "this is a job for the telegram botfather". Now that you've started down this road, you'll find you can get homeassistant to talk to the channel as well.
My home talks to a house telegram channel, pushing notices as need, such as "hey, do you realise you've left the main gate open for more than five minutes?"
And the whole family can subscribe to the channel - win win!
Plot Twist: His schedule of shooting this video got delayed because his components for this project was not received by him because he was busy soldering with music on
There are some things to note. Android Smartphones can be very tricky with engery savings, resulting in delayed or even no notification. A deeper look into the settings may help. There are a few things. Usually allowing an app to run it in the background and maybe even start itself and fideling with the engery settings of an app. Some apps can handle it better than others.
Maybe it can be even an issue of the app itself. With push notifications there are different types. Usually push means a server is pushing a message to your phone. An old way and a slow one is when the app needs to pull the notification itself.
When you are not happy on how apps work with these things, asking for help in the forums might give you options to change and help you to make it work for you better.
With the energy I must say that pulling energy from the intercom might be illegal. It can be considered theft. In apartment buildings its usually powered from outside your apartment and meaning the community pays for it.
There are smart home door solutions that are aware of it and they have options to power it from your end, so you don't steal energy.
In reality it might be hard to spot and the landlord doesn't care. But let's not forget, everyone is paying for it, for something you only use.
I also want to mention that this idea isn't new. There are solutions to connect an intercom to your phone. It's for the landline phone. You can control your intercom with it. It's usually for businesses. Also it's not that cheap, especially when you don't have a landline setup at home. But when your intercom supports it, you could open your door and speak to the intercom from your phone. You may not require a landline phone, because there are systems that support soft phones, meaning software phones and that means you could use a smartphone app. It's like a phone call.
I think a remote opening might be useful for deliveries. This gives you the time to go to the door, when the delivery guy is going up the stairs.
I'm not quite happy with the solution. It relys on external services. I would prefer a solution that doesn't need any external services. It would be nice when you could speak through the intercom via your phone and maybe even open it. The opening part should be optional, because this is a security risk and it might be good enough when you can speak to the person until you are at the door.
You know you have a tendency to overengineer things. Just hook up a light to your door bell and wire it through your house to your work place... o.O
Upgrade idea: Add an option to open the door from your workbench... Either an option in Telegram or a physical button.
A relay can be added and commanded by ESP to short the “door open button” contacts. But probably he wants to listen to the person on the other side before opening the door!
@@ubiquitousingit Lol... Right.
A better idea then!
Add a camera to the ESP like the one he uses for security, facing outwards. The moment someone knocks the message contains a picture of whoever is at the door.
Seems feasible 👌🏼
Skynet.
Not sure this is a really secure way to do this.
Cool project! I was thinking you could of gotten a long range wireless doorbell, wired the button into the intercom system so that when you press the intercom button it triggers the receiver, which you could have sitting on your desk. You could even add flashing lights to the receiver (some already come with this feature) so it's not just an audio chime alerting you. You obviously aren't notified when not at home though.
Personally, I would recommend placing a small (100nf) capacitor between the ESP's GPIO pin and ground. This capacitor and the upper resistor of the voltage divider form an RC filter that will help to reduce any transient interference which might cause false triggering. I might also suggest a bidirectional TVS diode in the same location to protect against any large voltage spikes or ESD.
9:34: Four seconds from pushing the doorbell and message appearing on the phone. Where I live, that's more than enough time for the delivery person to drop the package at some neighbor's house and race out of sight.
A light that flashes in your work space. A hard of hearing relative of my wife had a system that flashes rapidly if phone rings (old school home phone) and flashes a slower signal if the door bell is rung. Both elderly passed away more than a decade ago. It was part of a commercial security system that is long gone, but great idea.
And super easy to implement with common smart home software (like ZigBee lamps)
If you have home automation you could probably even make the normal lights flash.
This could be done with WLED and http notifications - only a few lines of code in the existing esp8266
This is what I would have done. A big flashing light. So much more reliable and easier to integrate than what was presented here.
Great, now the feds know when people come over.
What are feds?
OMG! I have exactly the same doorbell system in my terrible apartment, and the alarm sounds are just super painful, each time nearly giving me a heart attack! What do you think about a project that would give that crappy system some more pleasant ring tones? xD
And I also have another idea:
I'm in great fear of loosing my keys, because of the high cost to have some service open the door and possibly replace the door lock - so do you think you could create a system that opens your apartment's door by entering a programmable code sequence using the bell (like some letters in morse code or such..)
A lot of apartments around me in the US have really analog systems with terminals by TekTone. They have a dedicated wire for the "warble" tone when the doorbell is pressed. So I put a current-transformer around that and use it as an input in ESPHome, which works reliably. And I figured out what terminals to connect to trigger the door strike and connected a relay to them. It works really well and doesn't even require soldering since all the connections are at the screw-terminals.
He could have just installed a microphone instead of that circuit imo, as the doorbell rings the microphone could pick up the bell sound and then initiate the bot he later used. Tell me if I am wrong.
Although this kind of projects might sound boring, it's my favorite (after the super crazy ones) because it solves those annoying little problems that end up being completely frustrating.
Nice would be to add remote door unlocking also, if you can send a message back to the controller you could just close the circuit of the unlock button
I believe Brian's surname is pronounced "lock" :) - I'm glad you selected his library. He did a good job on it!
More like a Scottish/German ch :)
Nice video. Btw, what about adding an ESP Cam or a RPi Cam to the doorbell ? That would be awesome to check out who's in front of your door ! If it's the postman than your good ! If it's the 'Schuldeneintreiber' pretend that your not there... ;-)
Thank you for every inspiring video you post, but i would have to say that this time i was faster on creating similar system with a bit more functionalities. The one i built uses ESP32 and Uses battery as power source all enclosed inside the intercom itself. In addition to the regular notification that uses HA, i wired one of the pin to the unlock button, and using ESPhome that create a sensor, with some useful information such how many times my door being rang a month. I wanted to take that further, so i built an automation that will send actionable notification if i am home or away, but if i am at the building door but not inside the flat the system will trigger the unlock for me. so i do not need keys for the below door. it takes 7 seconds for the system to wake up from deep sleep, and trigger the door or send the notification.
Can you provide more information on this please?
This will be awsomw if you could explain this a bit, and do you think it is possible to use this with also a video feed, i gave a comelit with video
Next, hook up your LED strip behind your desk to an ESP32 with WLED or ESPHome and FastLED, and have it blink when the doorbell rings
Nice project. I now have interest in more info about the telegram bot. Anyways, I would have added a optocupler between your hardware and the intercom so as to fully isolate both systems.
@ GreatScott!
You can implent this with Home Assistant as well. Just do the doorbell ESP with ESP-Home and implement Telegram into your HomeAssistant. Ihave this with an automation for my washing machine and dryer. I get a message if the Powerconsumption drops under a certain value.
Interesting - I would take DC2DC converter and convert the 24+-V to 3.3V of the ESP. It uses peak 70mA, normally around 40mA, on 3.3V that makes 230mW peak, with 20% losses of the DC buck converter you get to 280mW max. No problem for neighbors :)
The 8266 can draw up to 400ma in certain situations so you would definitely need a supercap or a lipo at least...
It's not a bad idea but I think the DC-DC converter could introduce EMI in the system
I was going to say the same thing! A DC-DC converter could easily power an ESP. Even at full ESP power, you have PLENTY of headroom. And if there was any worry about EMI, etc, you could just reduce it to 4/5v, and have the 3.3LDO drop the rest.
Thanks for the info, I was able to have my old 1970's doorbell to send notifications to my phone but i had to make some modifications to the code and the pins!
i did almost the same in my flat years before :) I used a small mic, glued next to the ring speaker, and - since there was no ESP32 back then (or at least i don't had one) I made a louder alarm sound closer, where I usually stay :)
Yes, early in the video I thought to myself, "Why doesn't he just rig up a louder ringer?" But then, he wouldn't have got a YT video out it!
@@xmfclick because you won't hear a louder ringer in the basement or garden.
@@xmfclick There are maybe a few more ups to it. Because he get's notified even outside of his flat. Also he can use it for automations. I for example built a "Party mode" in mine. If party mode is set to on, it will automatically buzzer the entry door or if at the apartment door, open the nuki. So people arriving to the party or going for a smoke don't need a key or rely on somebody to let them in again.
Scammers love to use WhatsApp and Telegram.
If you see youtube comments or facebook posts with a contact number using one of those 2 services, it's essentially a 100% chance it is a scammer who will lie to you and find a way to trick you into giving them YOUR money, while you think you giving them THEIR money back.
I've done pretty much exactly the same thing about a year ago. I just used a shelly to send a notification to my phone using MQTT and home assistant. It can also be used to controll the lights which would be quite helpful to a deaf person lol.
Very Clever Idea 😄It's also useful when we are outside the house (travelling or office)👍 I request you to introduce a project with new Blynk app in next time ? Thank you❤️ Love from Kerala
Really cool & useful system,. yet what I find most impressive is how he has cable cover/duct on a wall that has significant texture. Long ago I gave up on using any cable ducts on textured walls because they never last a month before loosing grip.
Why did switching DC-DC with 1.7 VA also got a NO? Seems pretty good for a 34VA PSU
Have an idea, to use that intercom system to call to your phone. You can probably use SIM800 modules or similar ones. You can control answering button with esp/arduino also. :) Good video by the way ;)
That system is actually in use in some apartment buildings, at my uncle's house they get a call whenever someone rings the bell and they can talk to the person at the door. I think it's opened by pressing a certain number key on the phone.
Is soldering a zigbee button on the speakerinput wire a simpler solution?
Nice project. But integrating it with esphome and home assistant would have been way better. Home assistant does intergrade with telegram and you could have added an led strip at your desk that could flash a couple times when someone's at the door.
Leaving a comment for if anyone explains on how to do this and also in combo with maybe a video feed, because i have a comelit with video 2 wire config and trying to figure it out but i am not that technical, only a bit 😅
I once took a look inside the intercom in my apartment to try to do something similar and was shocked to find that the one I have ran on 230VAC, just at a screw terminal, that I can’t turn off myself.
Needless to say, I put that project on the backburner and thought of alternative ways of detecting a ringing intercom. I do know some smartphones have a built in assistive listening feature that in theory would notify a user of a doorbell sound, but I’m guessing that’s only effective if the phone is close enough to hear it clearly
Thanks so much.
I wanted to tackle the same system a year ago without reverse engineering the whole circuit board. (I've got the 4 button version without the phone handle)
Was about to use ldr and a relay to trigger incomming bells and opening the door but decided against it as it would probably end up pretty unreliable.
This makes it a lot easier. I'll probably use an optocoupler and a relay for opening to not interfere with the board but finally some guiding light without interfering with that complicated bus protocol.
As said: Thanks! Got new motivation :)
Isn’t there a way you can also awnser with something like “open” and it will put a signal into the open-button?
Hi. Super Video. Ich suche schon ewig nach genau dieser Lösung. Würdest du vielleicht den Code auf Github o.ä. teilen? Würde mich sehr freuen.
The code is in the description
Der Code steht in der Beschreibung des Videos
Is it really 6VA needed to make an ESP3866 go? wouldn't be 3.3V X 0.25A ?
Not that I think you should the intercom power.
Important to implement a Opto Isolation if you connect your power supply to any other ground referenced circuits so you do not have strange effects due to multiple grounding points-
Yes, its not more complicated then voltage divider. I'm surprised such "solution"
I guess there is some confusion. 0.25 A @ 3.3V right? That would be 0.825 VA. Please correct me if I'm wrong.
Wouldn´t it be better to use a optocoupler between ESP and the phone circuit for electrical separation?
Yes, and No, given a near buy Lighting Strike could induce many KV's into the intercom wiring, the optocoupler may be of no value. So I would give this design a fail.
I appreciate a nice DiY solution but last I checked you can change your interphone to whatever you want, including one that connects thru WiFi or Bluetooth and send you notifications...
Just a word of warning: it is easy to fry the controller in the basement and sometimes just adding a wire to e.g. the door opening button can make the bus lock up due to some EMV. And the controllers are really expensive so maybe putting a microphone next to the piezo is a more non invasive way :)
And yes, I witnessed these kind of projects going wrong three times
The problem with a microphone next to the piezo is that vacuuming near the door can, if the noise level is sufficient, also trigger a constant stream of messages. My little brother has cochlear implants, and my father installed a bell add-on in our house such that my little brother would receive an extra audible and visible notification to his room.
It was unfortunately also triggered by vacuuming near the door, essentially making it quite useless.
I bet more of them where from shorting the pins than anything else. It’s an easy mistake to make.
@@Mrcaffinebean nope, definitely not. A 10m long cable attached to the door open buttons to operate it from a table locked up the system, removing the wire then allowed it to be used again
Hey Scott can soldering wire in my local market cheap quality of wire are available which have 60% lead & doesn't melt at easily making it hard to remove while replacing components and doesn't shine there are also wire with 40%lead .
Displaying it's property physically and electrically can u make a video and where to use them.
From watching your tutorials as a university student to get featured in your video (indirectly though 5:38 ). I never knew this is going to happen. Thank you for your tutorials which helped me learn alot!!!
Glad it was helpful!
Also you can use IFTTT to control a smart light every time you get a telegram notification
wait is that allowed by your landlord/law? I wanted to do something similar when I was living in an apartment but apparently (for me tho) it was illegal to mess with the intercom since I did not 'own' the the intercom.
The main legal problem is the power supply. Use the power from the intercom is stealing. That is the reason commercial systems like Nuki use batteries
I am not interfering with the intercom in any way. I use my own power and basically only listen for a certain signal. That is why I think it is kind of like a grey zone. But like always, rebuild it at your own risk.
@@greatscottlab I think you should've used a connector or something. Soldering directly onto the PCB could be considered tampering with it
The biggest issue with the solution may be that he soldered the wires on the connector tabs. At least when he forgets to remove the wires and solder when moving out, so adding an accessory with the proper connector there would involve additional work.
And some contractor may just say that it has been altered and needs to be replaced entirely.
@@agnag1 If he just clips the wires inside the case, i doubt anyone would ever open it up, if it still works ofc. They will probably not even care at all, till someone tells them that it's not working. Just imagine the contractor opening all electronics and power outlets just to see if everything behind is still how it's "supposed to be" .. not gonna happen, ever.
iPhones (I think iOS 14 or above) have a feature, where they warn you if You use headphones and things like doorbells or fire alarms go off
I am definitely going to be making some modifications to my front door now. I can never hear when people knock when I'm in my room tinkering, but I usually have a video running on my phone, so push notifications are the perfect solution for me.
I like your English accent, you "sound" Dutch ? cool video too! Love the applied tech & DIY nature of it
Iv'e wanted to build similar system for years, but in addition, I would like to simulate the "open door" button press from the micro controller as well. That way, I can even let in post man while I am not home, which would be incredibly useful. @GreatScott! could you upgrade your system to do this ?
tbh i like the old intro better. I find the real physically built LED sign to be more satisfying. plus im sure most of us can appreciate how long that took to make haha
Nice! It's maybe better to send an MQTT message to Home Assistant though? From there, you can trigger automations, sound buzzers, flash lights, or send IM notifications using the same APIs. Seems like the more capable option.
Yep. I don't directly connect anything anymore. It all goes through MQTT and Node-Red. I can change the conditions and active times for any input and output that way. A button I push when I wake up can do something different an hour later and do something else again when it's bed time.
Great video Mr. Scott. I love how you make your videos in such a way where it is useful for everyone, and not a very specific project.
I was looking for something like this thanks, but for me, I only have a door bell which is old solenoid based ie when current passes through it it gets magnetized which rings the bell and is directly connected to mains so is it possible for me to do this?
And also is it possible instead of notification it rings my phone??
You could also integrate the telegram notifications with the Home Assistant. That way, you not only can send the notification, but also trigger the door lock with telegram actions from your phone.
Also a good idea :-)
That's not hard. Hard is listening the intercom with the phone to see if you can really open the door.
Couldn't you have just implemented something that listens to the ring of the intercom and notify you, wouldn't that be simpler
Simply put a relay to the push button of the intercom/doorbell, cable it into a dedicated bright lamp in your room. 😃
Or a small microphone, tuned to the bell noise and activating a smartlamp on his desk. No fiddling with wires.
That doorbell is very far away from the door... its an apartment
@@se_mat sound recognition is exponentially harder and more sensitive.
@@runforitman The bell is not citing Shakespeare, it is a very distinguish sound that a frequency filter and loudness resistor can handle.
@runforitman if it is multi storey apartment with addressed doorbel to each unit, then you can relay a lamp from the doorbell speaker in your room.
Eufy makes locks that have bell and push notifications. I think that would have worked too
And this is where you realise the delivery guy never actually rang your doorbell in the first place.
Haha that really happens sometimes....
knock knock
@@ddpxl Who's there?
ESP32 camera module would solve that, just need to find a way to mount and power it.
I’ve had pretty good results using a webhook via IFTTT and sending a push notification to the IFTTT app from various devices. Whether it be from a raspberry Pi, an ESP32, or a Particle Photon. You can structure the message using various values passed to the webhook. Anything from door opening notifications to low battery monitors, notifications have been pretty quick, usually within a second or two.
I need to check out that Telegram library though just for some other options.
I'm so sorry for you having that intercom. Those things have become a personal nightmare over the past few years.
Also
I've seen a lot of people do something like this.
BUT From the perspective of the guy searching an entire apartment building for whatever causes the intercom system to stop working.
Always again fun.
Been there, done that. It sucks. Dont do this ppl.
You could add functionality to also open the door from the app (i.e: With an interactive action in the message or by replying a particular message to the bot).
I'm interested in this, I also live in Germany :D
that would be great. i think this shouldnt be a big problem. next step: speak in your Smartphone and the Person waiting can listen to it
By far the most overcomplicated, overenginieered, unsafe, half-finished, unreliable, overkill semi-permanent solution to a non-problem. Absolutely loved it!
I also built something similar about 3 years ago with an arduino nano and an nrf24l01 which directly used the power of my Ritto door opener. I also added a solid state relay to turn on/off the bell at will and to fire the buzzer at the front door. It was really a fun project and extremely useful. Now after moving to my new apartment, I opted for a commercial solution: Nuki Door Opener. That thing is extremely easy to integrate with not much tinkering / reverse engineering the original door opener PCB. But OFC way more expensive (~100 Bucks).
Nice solution! The hass inconsistent respond time also boder me in this kind of projects!
Interesting video! I've had also similar idea, but had the bus-system in mind..
Hast du während deiner Recherchen zufällig rausgefunden, ob man das Bussystem nutzen kann um untereinander zu kommunizieren?
Wird eine Verschlüsselung benutzt? Wir haben in unserem Wohnblock exakt die selbe Anlage, aber für ca 100 Wohnungen :D
I was thinking of doing something similar but with zero modifications to the intercom. Basically a microphone and a trained AI that can listen for the sound. It wouldn't be as responsive but they also couldn't blame me if the intercom broke.
Alot of effort to get the AI trained and up and running but yeah would be nice since it doesn't require direct mods to the intercom. I'm sure the landlord trusts him lol
@@tenseikenzx-3559 also could just test for loudness, make it simpler.
@@wadepenner but then potentially any external loud noise could trigger it
I don't know how to feel about this. i was literally thinking about this 3 hours ago wondering whether it existed or not. now this appeared on my recommended. Funny/weird thing about it is that I wasn't even thinking out loud
Why not just use the push service of Home Assistent?
dident you do something like this years ago???
Your power supply math is wrong! The esp8266 chip can handle a max of about 250ma (I suspect your project would barely even reach 150) at 3.3v. This makes the total more like 0.825VA peak, easily a safe amount to use, even if all your neighbours had them too!
One the most useful video by using IoT
I would have just put the new PCB inside the phone housing, that would have looked tidier surely?
Had the same thought. There seemed to be plenty of room inside, but maybe he wanted to avoid making a permanent change to the actual phone housing to route cables in (which may annoy the landlord).
How about just getting a louder doorbell?
The ESP requires 250mA @ 5V, which is 1.25VA. Not 250mA @ 24V. It was probably good enough for the intercom system.
Hot air station model?
Whyyyy WhatsApp. Facebook is so ugly. I don’t looked the full video but please use another messanger
Ohh yes. You made it
Would be cool if you could talk using your smartphone, but maybe that involves reverse engineering the whole comunication protocol...